Patents by Inventor Ralph C. Gray

Ralph C. Gray has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pretreating composition containing substituted triazine compound
    Patent number: 5360492
    Abstract: An aqueous pretreating composition for application to a metal surface, said composition having a pH of from about 3.4 to about 6, comprising at least about 0.01 percent by weight based the total weight of the composition of a substituted triazine compound selected from compounds having the structures: ##STR1## wherein R.sub.1 and R.sub.2 and, where applicable, R.sub.3 are the same or different and are selected from the group consisting of --OH, --SH, --NH.sub.2, .dbd.O, an allyloxy group having 3-8 carbon atoms and a carboxy alkyl group having 2-8 carbon atoms.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: November 1, 1994
    Assignee: PPG Industries, Inc.
    Inventor: Ralph C. Gray
  • Method of treating nonferrous metal surfaces by means of an acid activating agent and an organophosphate or organophosphonate and substrates treated by such method
    Patent number: 5306526
    Abstract: A method of treating a nonferrous metal substrate such as aluminum with an acid activating agent such as HF followed by treating with an organophosphate or organophosphonate. The treatment provides for improved adhesion and flexibility as well as resistance to humidity, salt spray corrosion and detergents of subsequently applied coatings.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: April 26, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Ralph C. Gray, Michael J. Pawlik, Charles F. Kahle, II, Paul J. Pruchal
  • Non-chrome passivation for metal substrates
    Patent number: 5294265
    Abstract: Aqueous acid solutions for treating metal surfaces such as aluminum and galvanized steel are disclosed. The solutions are mixtures of organophosphates or phosphonates and chloride or fluoride. The treating solutions can be used in place of chromium treating solutions.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: March 15, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Ralph C. Gray, Michael J. Pawlik, Paul J. Prucnal, Christopher J. Baldy
  • Method of pretreating metal by means of composition containing S-triazine compound
    Patent number: 5149382
    Abstract: Disclosed herein is an aqueous composition containing an S-triazine compound having at least one hydroxyl group composition adapted for use in pretreating a ferrous or non-ferrous metal surface.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: September 22, 1992
    Assignee: PPG Industries, Inc.
    Inventor: Ralph C. Gray
  • Acrylated alkyd and polyester resins
    Patent number: 4517322
    Abstract: Non-gelled resins formed by reacting an ethylenically unsaturated polyester with ethylenically unsaturated monomers which include an ethylenically unsaturated acid are provided which are useful in coatings having better stability.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: May 14, 1985
    Assignee: PPG Industries, Inc.
    Inventors: William J. Birkmeyer, Ralph C. Gray, Rostyslaw Dowbenko, David C. Kapp, Ellor J. VanBuskirk, Rudolf Maska
  • Method of applying zinc-rich primer and product
    Patent number: 4346143
    Abstract: An improved process for providing corrosion protection to ferrous metal substrates is disclosed. The improved process involves a first treating of the surface of the ferrous metal substrate with nitric acid followed by directly applying to the previously treated surface a zinc-rich coating composition. Upon curing the zinc-rich coating composition, an adherent electroconductive coating is formed. The coating provides excellent corrosion protection and since it is electroconductive, the coating is weldable and can accept a subsequent electrocoat.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: August 24, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Charles L. Young, Jr., Ralph C. Gray
  • Stable aqueous dispersions of particles of vinylidene fluoride polymer
    Patent number: 4309328
    Abstract: Coating compositions based on stable aqueous dispersions of particles of vinylidene fluoride polymer are prepared by bringing into admixture unstabilized particles of vinylidene fluoride polymer, liquid organic active solvent for the vinylidene fluoride polymer, liquid nonsolvent, which may be liquid organic nonsolvent, water or a combination of liquid organic nonsolvent and water, and, if not present in the liquid nonsolvent, water. The mixing is conducted such that the particles of vinylidene fluoride polymer are wetted by the dispersion vehicle, yet the particles are not substantially solubilized by the active solvent.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: January 5, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Dennis W. Carson, Ralph C. Gray, Glenn W. Luckock